Constant-volume regulator



March 30 1926.

L. R. HUFF CONSTANT VOLUME REGULATOR Filed '.No`v.

1o 1 volume regulator for turborblowers,

Pamesa Mar. 3o, 192e. y

LESLIE R. EURE, lor `1 1111.1`.1PsBURsf;v l 'NEW YJERSEY,l Ass'IGNoR frol INGERsoLL-RAND l COMPANYL or JERSEY-CITY, Newk JERSEY, A CORPORATION 0E NEW JERSEY.v

. coNsTANT-VOLUME REGULATOR.

pfappiicanenfaea November 3,1925. serial Nq.'ee,e23.

To all whom it may concern: l g1 -Be it known that I, LESLIE R, HUrF, a citizen of the United States, anda resident of Phillipsburg, county of Warren, and State of New l Jersey,'. have invented `a certain- Constant-Volume .Regulator, of which the following' is a specification-accompanied.by drawings. u 'l A This invention-relates to volumeregula.-

tors,V but more particularly toaconstant.y

turbo" lThe objects ofthe invention are to insurey aconstant intake'volume of air toa turbo blower or other similar machine irrespective of:any fluctuations which` may occur in th edischa rge pressure ofthe machine, Vand produce such regulation by simple and eficient devices including avalve in the intake..y

Otherobje'cts Awill be in part obvious and v y ycoaxia-lly with the tube Q, is a hollow sleevek in part pointed out hereinafter.y f- `The invention-consists' of the combinations of elements, features of construction, and arrangement of parts having thegeneral mode of operation substantially as hereinafter describedv and moreV particularly pointed outin theappended-claims and illustrated'in the accompanying drawing.

lThe vfigure inthe drawing is an elevation, partly in section, of a constantvolume regulator constructed in accordance with. the

, blower.

practice of'the invention and shown connected to the intake conduit of a turbo Referring to the drawing,l A. indicates a turbo blower connected to loe-driven by a constant speed motor B.' lThe turbo'` blower A and the motor Bare in this `inst-ance mounted on a foundation C through which extends a connection Dbf'anintake' conduit E. vThe intake conduitV E in` this"ininstance is in the form of a. Venturi tube and accordingly has a restricted portion F and an enlarged Vportion G. A'pipe or tube H preferably formed integrally with kthe enlarged portionGeXtends upwardly therefrom to support one end ofl ai base' J.y At' the juncture of the enlarged 4portion G and the restricted portion F another -pipe K' eX- tends upwardly to a; level with 'the upper end of the pipe H "and" yalso forms a support basev .and securedi'.'thereto in' yanysuitable the base to form chamber O inwhichfis arranged 'a bell float P. Formed integrally with the base J and extending upwardly intofthe interior ofthe bell floatP -is a ho'lblowerA, a suction may be created inthe interior'of thebell P by the velocityof the air flowing Ithroughtherestricted portionF in communicadionV with the chamber O .through a port S. vThe interior ofthe bell Pl and thechaniber O- are preferably held Alow tube Q, which registers -with the pipe K so thatdurlng the operation of the Yturbo pipe H atene end,and yatthe other endA is against 'communication by any suitable l* liquid, as for instance water T.

U which mayl act asa guide fora lrodV to Supported by the cover L and Preferabll Any suitable means may be provided for -securing the bell floatl P to the rod V, but such means' preferablyconsi'st of a loose jointfas perfectly vertical position, as well as .undue friction .of the rod. V yagainst the sleeve U for instance a'ball joint',so that the bell float will be eliminated. A ring orI washer W secured to the top of the sleeveU to slidably" engage the 1`0Cl V'serves to sealfthetop of the chamber O,

Suitable means are provided lfor counterbalancing the' for'ceA ofi the suction acting on the' bell' P. To this end-acylinder X is Y formed on the cover L to receiveslidably a regulator piston "Y which is adapted tobe actuate'dfby oil underjpressure admitted into a chamber Z by acontrol valve b. The piston Y encircles thej sleeve U and'is'secured v fixedlyl to the rod V, Upward movement `of the piston Y withjrespect to 'the rod V is limited by` a nut c carried by thev rod'V. The Tupperor outer end of the ycylinder lX is preferably recessed as at Z-to r eceiveany oil which, may leak past the p iston;Y, anda v'passage le [leading Y from'Y the recess.- d, to j a eakage les Y oil.' yThe drain passage]c preferably leads be used if desired. Y i In order to adjusttlie control valve b so to an oil reservoir so that the oilinay again that asalta-ble pressure may be maintained' withinthe chamber at all times. to reta-rd downward Vmovement of the bell float P, a

" compression *spring g is arranged t-o act against the upper end yof the yal-ve Z) and 'bears vat its upper end4 'against an-adjustingspin'dle 7L. "'llieadjusting spindle L is preierably in the ro-iinor a'fserewV and has a lia-nd wheel.' for manipulating" lthe spindle it"A to adjust 'the teiis'ioi'i or the spring'g for dir-y In this instance iluidE under pressure7 asfror ineta'nce oil-,fis .conveyed from; asuit-r' able vsource ors'upp'ly througlia pipe 7c' into an annular groove j f-'o-rined intjhjefvalve'` casing-p'. 'Pheannular groove 0, enc'i'r'cles a sleeve g which is adapted to receive the Y Valueand-is prov'ided Vwith a plurality of `port-s rin constant coinmunicatioiijwith the' annular groot-"e The valve fpre'ferably provided with ajhollow bore s which e'iteifi'ds]A` partly throughout its lengtliiand is adapted toconimunicat'e with the ports 7' in the sleeve githrouglr a plurality of porter.

;. yTo pro-vile for the escape ory oil incase of excessive pressure against the val-Ve',l a. i y'series of-poi-ts a are formed in' die sleeve 'Qaloye the ports-r tof-register with aiian'nu- W-ltli the drain'passagef-pioVides-a; convenlargroove'o formed i'ir'tli'e yal-ye' casing Apipe-fw connected at one-end to'eoinmu'nicate with'the groove 'o and at-vits other end ie'ntjineans for, carryingvott` the-.bypassed Disposed on top-'or the cover.y and suit# ably secured. thereto by any suitable means isl a cylinder provided atitslower-i'nost opening with a cylindercover y. A piston vV. Formed integrally-with the cylinder is a, valve'- chest-'6 *')LJroi/ided wit-h'- aported sleeve 7`- whicil'i Serves as aguide Afor a' 'pilot' 'valve- 8. The pilotvalveisi-inV t-lieinstance provided 'with heads` 9" andi- 10y and-'entends ly tliroug'li-t-lievalrecheetto; contally-witlifthe balancing lever 1i neet y. pref ablyintermediateits-ondeals-at12. ll-

p'ii or passages 13 and 14' in this instance lead from t-li-eftop and bottom ends?v of: the

cylinder @o -tothe sleeve 7" and-1 are controlled' by the; heads 10 and 9 :respectively-"of the .ber from asource orsupply.

suoli as oil, maybe admitted into said In order thatV any oil which may readily exhausted-therefrom. yto the drain passage-f, afport-l-S` is'v formed in thersleeve l y n 16e-admit; ted tothe topvend or the cylinder 'm may be 7 directly above the vpassage 13 and coin'-Vv *1n-unieates;with a passage 19 leading to ay port Y wliieli registerswith a port 21 lead# ing fromftlie drain passage f.

- To the end that a constant volume or air through'thevconduit Eii'nay at -all'- times be maintained irrespective of' the resistance created by the disehargepressureor the i y Vpivotally in a Valve' seat QBinterpo-sed-in thev blower-A, throttle valve 22 is arranged conduit E. The throttle ivalvef22 y'is "preerf` ablyprovidedwith-a Vcrank-24 lto which is Y througha sleeve .2S arranged-- w'itli-inlthe cylinder-cover y. Ther-'od 27 is in this instance secured tov the lower end'oi'Y the pis- 9"() ton a :indie-'guided by the 'sleeve 28. 'If de- Sired-a-"recess--ZQ' maybe formed in the top of the pistoni m -to'- receive a spring 30 which Y seured pivotally a rod 25 carrying-atits upf Y y per end aro'r'l 276. 'y Gmineetejd pivot-ally tol tl'iefor-ky 2o` is a@ rod5 Q7 which extends' will tend to constantly forceV thev piston The operationy ot the device is as'rollows:

vassuming tha't-'theturbo blower A' isrunning at its normal speed, airdrawn thereby through tlierestriotedz port-ion F of the oonduitE will become sub-atinospliericfanddueto .its increased? velocity through said 're` Vst iieted portion will creat-oja suction in the f interior-'lof' the bell float P and constantly tend "to draw said' `float downwardly toward the bottoni ofthe-casing J. 'Aitythesaine time the-passage 'or the airthroiigh the eiilalrged porti'oiiG ivil-l-diaw 'or exhaust the air from the chamber O exteriorof ,thel bell iloatfP. However, owingto` the difference iii velocities through the lenlarged portion G and the restrictec'l portion F5 asligl'itly' higher pres-r sure" willeXist exterior of' the bell float P than 'within said oat. blowcr'A ruiming at normal speed, thepressure of the'- oil entering the chamber Z will also have attained its maximum pressure and, acting against the botto-mor the pisw ton Y; -will :tend to 1roi-ee'.fjsadA pis' tonupwardly y andi thus. eouiiteiibalance the force or the suction acting onf the float P1.

With the turbo During 'the time that-.the forces' acting against'the float-fl? andthepiston Y'a-ie 'equaLtlie-valvelb will remain approximate# lyintlieposition: indicatedv in the drawing,- at is-,j the porty t will.l be in registration slithe. port-- e so. that the pistonwillbo ,efiveloeityfn die @enduitis; a-

posied directly to tliefliie, pleasure 'ort-lief v Whenever the; resistanoel inv the! dissn pressure decreases; sofy that .in tlifllne@y creased, the suction` acting on the bell float P will be correspondingly greater and' thus overcome the pressure acting against the piston Y thereby displacing to some extent the oil in the chamber Z. VThe oil thus dis placed will force the valve Z) upwardly until the port t registers with the port u and a portion 'of the oil will pass into the drain tion ot the piston Y and .theb'ell float P will rock the balancingv lever Il which in turn will reciprocate the pilot. valve 8. Theretore, ii' the velocity of the air through the conduit E is suthciently great to draw ythe float P downwardly, the valve Sy will accordingly be pulled downwardly 4and uncover the passage lll. Oil will then llow from thel chamber 16 beneath the piston e and force the said piston upwardly thereby rocking. the throttle valve 22 towards its closing position and reducing the volume of air to the turbo blower A. After the resistance in them discharge pressure line again increases, the velocity of air through the conduit E will proporti-onately decrease, thus permitting the float P to rise in the chamber O. Upward movement of the float will raise the valve 8 and uncover the passage 13 to admit oil to the top of the cylinder `X. The pres- Sure of the oil thus yadmitted will act againstvthe piston and together with the force of the p spring 30 will again open the valve. Since in this position oll the pilot valve, the passage 14 `will also be uncovered, the oil in the bottom of the cylinder X will be forced through the `passage 14 .and through the sleeve 7 and the ports'QlO and 21 into the drain passage f.

The advantages of this invention reside ing through the conduit for automatically adjusting the position of the valve whereby the intake volume of air to the blower may be controlled. y

2. A constant volume regulator for a ino. tor driven turbo blower comprising an intake conduitt'or the blower, a valve rotatable in the conduit, and means actuated by the air passing Vthrough the conduit and connected to automaticalhY oscillate the valve Y for controlling the intakevol'ume-of airto the blower with respect vto the discharge pressure 'of the blower. j

3. A constant volume regulator fora'motor driven turbo blower comprising an' intake conduit for the blower, `a throttle valve rotatable in the conduit, a float actuated by the air passing through the conduit, a regulator piston lassociated with thev float for counteracting movement of said float, and

pressure fluid actuated means controlled by the float connected to oscill'ate thevalve for r ,Y

controlling the intake volume'y ot air kto theY `blower with respect to the discharge pressure ofthe blower. v y Y Y l .y t. A constant `volume regulator for a motor driven Vturbo blower comprising anvintake conduit for the blower, a throttle valvev `rotatable in the conduit, a floaty actuated by suction created vby t-lieair passing through the conduit, a tluidact-uated regulatorppis- 'i ton' associated with the float for counterbalancing the suction acting. on said loat, means for automaticallycontrolling the sin ply ot pressureV lluid to said piston, a balancing lever connected to bejrocked by the lioat, a piston connected to the balancing lever and 'to the throttle valve, and apilotvalve actuated by the balancing lever to` control the admission of pressure iluid for actuating the said piston in opposite directions whereby the throttle valve maybe opened and closed to control the intake volume -of'air to the blower in accordance with the discharge pressure of the blower. l

V5. A constant volume regulator for a motordriven turbo-blower comprising an in-. take conduit for the blower, a throttle valve rotatable in the conduit, a float actuated by suction created by the air passing vthrough thel conduit, a fluid actuated regulator piston associated with the oat vfor counterbalancing the suctionyoyn said lloat, a control valve for automatically controlling thev supply of pressure fluid to said piston, a balanc-v ing lever connected to be rocked by the lloat, a piston` connected vto i the balancing vlever andto the throttle valve, a pilot valve actuated by the balancing lever to control the 'n admission of pressure fluid for actuating the said piston in opposite directionswhereby the throttle yvalve maybe openedand closedk to control the intake volume ot air to the blower in accordance with-:the discharge pressure-ot the blower, and a spring acting against one side ofthe piston to augment the pressure fluid for opening the valve.

In testimony whereof I have signed this specification. 4 Y

` vLnsLna nuora v llll 

